Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 742,546	$ 681,433
Accounts receivable, net of allowance for doubtful accounts of $105 and $2,838, respectively	436,560	440,692
Inventories, net	397,181	381,334
Prepaid expenses and other assets	42,263	28,057
Income taxes receivable	120	146
Total current assets	1,618,670	1,531,662
Property, plant and equipment, net	186,473	166,148
Goodwill	191,616	191,616
Deferred income taxes	4,034	6,572
Other, net	96,524	102,670
Total assets	2,097,317	1,998,668
Current liabilities:
Current installments of long-term debt and capital lease obligations	18,274	12,396
Accounts payable	362,701	326,249
Income taxes payable	11,662	3,534
Accrued liabilities	85,679	70,202
Total current liabilities	478,316	412,381
Long-term debt and capital lease obligations, less current installments	193,406	211,252
Other long-term liabilities	89,749	9,570
Deferred income taxes	7,027	0
Shareholders' equity:
Preferred stock, $0.10 par value; 5,000 shares authorized, none issued
Common stock, $0.10 par value; 145,000 shares authorized; issued and outstanding - 49,143 and 49,330, respectively	4,914	4,933
Additional paid-in capital	634,192	626,306
Retained earnings	697,862	748,402
Accumulated other comprehensive loss	(8,149)	(14,176)
Total shareholders' equity	1,328,819	1,365,465
Commitments and contingencies
Total liabilities and shareholders' equity	$ 2,097,317	$ 1,998,668